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If you could use a micro-laser to destroy the larger cell in a two-cell plant embryo, how would it likely affect embryonic development?
A)The embryo would develop normally except it would not become anchored in the seed wall.
B)The embryo would develop normally except it would have multiple cotyledons.
C)The embryo would fail to develop, but a fully functional suspensor would form.
D)The embryo would immediately be aborted, and the seed would not form.

Loss-of-function mutations in the suspensor gene in Arabidopsis led to the development of two embryos in a seed. After analyzing the expression of this gene in early embryos, you find high levels of suspensor mRNA in the developing suspensor cells. What is the likely function of the suspensor protein?
A)Suspensor protein likely stimulates development of the embryonic tissue.
B)Suspensor protein likely stimulates development of the suspensor tissue.
C)Suspensor protein likely inhibits embryonic development in the suspensor.
D)Suspensor protein likely inhibits suspensor development in the embryo.

How would plant development change if the functions of SHOOTMERISTEMLESS (STM) and MONOPTEROUS (MP) were reversed?
A)The embryo-suspensor axis would be reversed.
B)The embryo-suspensor axis would be duplicated.
C)The root-shoot axis would be reversed.
D)The root-shoot axis would be duplicated.

The most obvious difference between plant embryonic development and animal embryonic development is that
A)plants develop from unfertilized eggs, while animals develop from fertilized eggs.
B)plant morphogenesis is entirely growth dependent, while animal morphogenesis involves movement of cells within the embryo.
C)plant embryos have an available source of nutrients, while animal embryos must begin feeding to obtain nutrients.

Which of the following is not evident from looking at a plant embryo?
A)You can tell if the plant is a monocot or dicot.
B)You can tell where the shoot will form.
C)You can tell where the root will form.
D)You can tell when the seed will germinate.

Both seeds and fruits are well adapted to
A)provide nutrition to animals.
B)act as a dispersal mechanism for plants.
C)allow plant embryos to remain dormant for long periods of time.
D)all of the above

The longest period of time that a seed can remain dormant is

Fruits are complex organs that are specialized for dispersal of seeds. Which of the following plant tissues does not contribute to mature fruit?
A)sporophytic tissue from the previous generation
B)gametophytic tissue from the previous generation
C)sporophytic tissue from the next generation
D)gametophytic tissue from the next generation

If you wanted to ensure that a seed failed to germinate, which of the following strategies would be most effective?
A)prevent imbibition
B)prevent desiccation
C)prevent fertilization
D)prevent dispersal

How would a loss-of-function mutation in the a-amylase gene affect seed germination?
A)The seed could not imbibe water.
B)The embryo would starve.
C)The seed coat would not rupture.
D)The seed would germinate prematurely.

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